APIAPI Hydrometers

API Hydrometer: API ASTM Plain Form, 19/31, 0.1

The API Hydrometer is an API ASTM Plain Form hydrometer with a range of 19/31 and scale divisions of 0.1. It has an overall height of 13 inches and is identified by manufacturer part number GW003H.

SKU 3G-OTH-368883

Brand

API

Item

Hydrometer: API ASTM Plain Form, 19/31, 0.1

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Delivery: Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to: Singapore

Technical Specifications

API

Manufacturer Part Number

GW003H 

Range

19/31 

Scale Type

API ASTM Plain Form 

Scale Divisions

0.1

Technical Documents

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API Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

The API Hydrometer is an API ASTM Plain Form hydrometer with a range of 19/31 and scale divisions of 0.1. It has an overall height of 13 inches and is identified by manufacturer part number GW003H.

Frequently Asked Questions

What is an API hydrometer used for?

An API hydrometer measures the specific gravity of petroleum products and crude oil according to the American Petroleum Institute (API) scale. This ASTM Plain Form model with a 19/31 range is used in refineries, labs, and fuel testing to determine API gravity, which indicates fuel density and quality.

What are the specifications of the API ASTM Plain Form hydrometer GW003H?

The API ASTM Plain Form hydrometer (MPN GW003H) has a range of 19/31, scale divisions of 0.1, and an overall height of 13 inches. It is designed for precise gravity measurement of petroleum liquids and meets ASTM standards for accuracy.

Where to buy API hydrometer GW003H worldwide?

3G Electric supplies the API hydrometer GW003H worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us to order this ASTM Plain Form hydrometer with a 19/31 range and 0.1 scale divisions.

How to select the right API hydrometer for fuel testing?

Select an API hydrometer based on the expected API gravity range of your fuel. For crude oil and light products, a 19/31 range with 0.1 divisions offers sufficient precision. Ensure the hydrometer is ASTM-certified and has a plain form design for easy reading in a standard cylinder.

Used in

Common applications for API

Petroleum refining — API ASTM Plain Form hydrometers (e.g., range 19/31) for measuring crude oil gravity during distillation

Fuel blending — API Combined Form hydrometers (e.g., range 39/51) with thermometer for real-time density checks in gasoline blending

Marine fuel handling — API hydrometers (e.g., range 40/80) for verifying bunker fuel API gravity at storage terminals

Quality control labs — API ASTM Plain Form hydrometers (e.g., range 49/61) for routine testing of light distillates

Field testing — API Combined Form hydrometers (e.g., range 29/41) for portable density measurement in pipeline sampling

Petrochemical production — API hydrometers (e.g., range 15/21) for monitoring solvent density in chemical processing

API Products

3G Electric supplies API api hydrometers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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